To provide a waste disposal apparatus which is capable of self-sustaining without contaminants remaining in the interior and easy to wash out and falling out when it is taken out to the outside, Provide a storage tank.SOLUTION: The dirt storage tank 100 has a tank body 10 having a bottom portion 11 having a curved inner surface and a tubular side portion 12 and storing a mixed liquid containing a liquid or a solid material, a tank main body being detachable , And the tank main body 10 is provided with a plurality of engaging protrusions 13 on the surface of the side surface portion 12. The base member 20 has a hollow cylindrical portion into which the bottom portion 11 can be inserted 21 and a plurality of engaging openings 22a into which a plurality of engaging protrusions 13 can be fitted respectively, and the bottom portion of the hollow cylindrical portion 21 is located in a flat surface.BACKGROUND OF THE INVENTION【課題】内部に汚物が残留し難くかつ洗浄が容易であり、しかも外部に取り出した際に倒れることなく自立することができ、また、簡単な構成を有しておりかつ製造が容易である汚物貯留タンクを提供する。【解決手段】汚物貯留タンク100は、内面が曲面状の底部11と筒状の側面部12とを有し、液体又は固形物を含む混合液を貯留するタンク本体10と、タンク本体が着脱可能に装着されるベース部材20とを備え、タンク本体10は、側面部12の表面に複数の係合突起13を備えており、ベース部材20は、底部11を内部に挿入可能な中空筒状部21と、複数の係合突起13がそれぞれ嵌入可能な複数の係合開口22aとを備えており、中空筒状部21の底部が平坦な面内に位置している。【選択図】図1
